M42.
On 29 January 2006 I imaged a small part of M42, outlined on the M42 photo below. I used my Celestron 11 with f/6 reducer, SBIG ST-10XME with CFW-10 and Astrodon LRGB filters. Luminance was 24x5m (2 hrs) at 1x1 binning, RGB were each 6x5m (30 m total each) at 2x2 binning. The weird RGB structures in the upper part of the image are reflections in the camera.
The outline drawn on an excellent hi-resolution M42 image by Karel Teuwen (used with his kind permission) shows approximately the area that is shown above. It's on Karel's image that I noticed the somewhat denser structures in this gascloud, as seen in the crop, that's why I imaged this area..
31 January 2001. Experimenting with my SBIG ST-8+CFW-8 (pixel binning 2x2) and my Takahashi CN212, working with the CN212-reducer at f/9, I made this image:
The image consists of one Luminance image, selfguided for 10 m; one Red image, T&A for 2.5 m (5x30s); one Green image, T&A for 2.5 m; one Blue image T&A for 5 m. I had (and hate) to use Track & Accumulate (30s subexposures) because my guide star was too weak for selfguiding, which gave some interesting problems to align the images (images not the same size...)! All images were treated in AstroArt with a medium high pass filter and adjustments of the histogram (log scaling). There was a quarter moon setting in the west, it was hazy, the seeing was bad with freezing temperatures - well, just a night to try things out ;-) !
6-7/10/1999 : Image of 10 minutes exposure on Fuji Superia 800 with a Takahashi Epsilon 160.
10/01/99. An ST-7a image of M42 with the 190/200/760 FFC. ST-7 working at -10° C, 10 m integration with 9 micron pixels. This image was not flat-fielded.
Image taken on 13/09/1996 in Cruis, S-France. 190/200/760 FFC, 30 m exposure on Fuji G800.
This image of M42 was made in October 1990. I'm sorry, but I couldn't find my notes about when and how exactly this picture was taken.